OBDII emissions nightmare.... P0443 code evap emission control - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

az_240 · 01-22-2010, 05:40 PM

I've had this dilemma for a while on my 97'(auto to manual swap) and after borrowing a working cat and the correct ecu Im STILL getting a code... P0443 Evap Emission Control System Purge Control Valve Circuit and I failed the gas cap test.

The guy at autozone looked at my emissions sheet and immediately said it's gas cap throwing that code... so I tried replacing the gas cap with a new aftermarket one and a new OEM one and had the codes erased both times and both times the code came back after several minutes of driving.

Autozone gave me a list of things it could be from their system.

-Blocked purge hoses
-Faulty canister vent control valve
-Plugged EVAP canister
-Faulty EVAP canister purge volume control

Gas cap is not even listed....

I do not remember getting this code when I had my auto ecu in.... I could not pass with that ecu because I was getting a transmission signal malfunction code. Are the manual and auto emissions systems slightly different somehow???

Has anybody here had this issue?

I've been unemployed for almost 2 years now so I have no money for a bunch of new parts and don't have a car to get around most of the time.

I'd really like to do a wink wink kinda deal.... if anyone knows someone please pm me. But if you have info on what I could do to pass without spending a ton of money I'd greatly appreciate it.

01-22-2010, 05:40 PM	#1
az_240 Post Whore! Join Date: Jan 2006 Location: Phx Posts: 3,097 Trader Rating: (41) Feedback Score: 41 reviews	OBDII emissions nightmare.... P0443 code evap emission control I've had this dilemma for a while on my 97'(auto to manual swap) and after borrowing a working cat and the correct ecu Im STILL getting a code... P0443 Evap Emission Control System Purge Control Valve Circuit and I failed the gas cap test. The guy at autozone looked at my emissions sheet and immediately said it's gas cap throwing that code... so I tried replacing the gas cap with a new aftermarket one and a new OEM one and had the codes erased both times and both times the code came back after several minutes of driving. Autozone gave me a list of things it could be from their system. -Blocked purge hoses -Faulty canister vent control valve -Plugged EVAP canister -Faulty EVAP canister purge volume control Gas cap is not even listed.... I do not remember getting this code when I had my auto ecu in.... I could not pass with that ecu because I was getting a transmission signal malfunction code. Are the manual and auto emissions systems slightly different somehow??? Has anybody here had this issue? I've been unemployed for almost 2 years now so I have no money for a bunch of new parts and don't have a car to get around most of the time. I'd really like to do a wink wink kinda deal.... if anyone knows someone please pm me. But if you have info on what I could do to pass without spending a ton of money I'd greatly appreciate it.